Gerard Caudal
CETP/University of Versailles
CETP, 10-12 Avenue de l'Europe,
Tel.: +33 1 39 25 48 53

Cursus: Ecole Polytechnique (1971-74). Ecole Nationale Superieure des Telecommunications (1974-76), These d'Etat (1987). Present job: Professor at the University of Versailles-Saint Quentin.

From 1976 to 1980: Engineer for the design of the telecommunication network

From 1981 to 1988: research on ionospheric and magnetospheric physics. Interpretation of the data obtained with the European ionospheric incoherent scatter radar EISCAT. One year (1997-98) at Goddard Space Flight Center (USA) to study the electrodynamics of the magnetosphere of Jupiter.

From 1989 onwards: study of the ocean-atmosphere interaction by remote sensing techniques. Participate to the implementation of the airborne radar RESSAC (developed at CETP) for the measurements of the directional spectrum of sea waves. Airborne measurements of the hydrodynamic modulation of short sea waves waves by long waves. Study of the anisotropy of the sea surface at short scale, by inverting electromagnetic models linking the radar cross section to the sea wave spectrum.

Caudal G., Self-consistency between wind stress, wave spectrum, and wind induced wave growth for fully rough air-sea interface, Journal of Geophysical Research, 98 (C12), 22743-22752, 1993

Caudal G., Le Proud'hom E., Anisotropy of the sea spectrum at 3cm-30cm wavelengths, inferred from C-band radar sea echo model, International Journal of Remote Sensing, Vol.15, No. 3, 657-667, 1994

Hauser D., Caudal G., Shay L. K., Behavior of the ocean radar cross-section at low incidence, observed in the vicinity of the Gulf Stream, IEEE Transactions on Geoscience and Remote Sensing, Vol.33, No.1, 162-171, 1995

Caudal G., Hauser D., Directional spreading function of the sea wave spectrum at short scale, inferred from multi-frequency radar observations, Journal of Geophysical Research, 101(C7), 16601-16613, 1996

Hauser D., Caudal G., Combined analysis of the radar cross-section modulation due to the long ocean waves around 14 and 34° incidence: implication for the hydrodynamic modulation, Journal of Geophysical Research, 101 (C11), 25833-25846, 1996

Caudal G., On the dependence of the equilibrium range of sea wave spectra with wave age, Boundary-Layer Meteorology, 86, 29-45, 1998.

Role in the SMOS mission:

Perform studies on the physics of the measurement of brightness temperature at L-band. Special emphasis will be given on the effect of the sea surface on the brightness temperature and its consequence on the retrieved SSS. Different models of the sea wave spectrum as a function of wind will be tested. The sensitivity of the error on the retrieved SSS due to the uncertainty of wind speed will be evaluated for the different sea wave spectral models currently available. The effect of the ionosphere may be also studied, in particular to assess the importance of measuring the third Stokes parameter to estimate Faraday rotation.